Permanent chill mold for the continuous casting of metals

Abstract

A permanent chill mold for the continuous casting of metal, having a mold cavity ( 2 ) which has a pouring slot ( 3 ), an exit opening ( 4 ) and a casting cone ( 6 ). At least one concave bulging ( 7 ) is provided that extends in the casting direction (G), which begins at a distance (A) below a predetermined casting bath level position ( 5 ) and extends up to the exit opening ( 4 ).

1. A permanent chill mold for the continuous casting of metal, comprising a mold cavity, the mold cavity having a pouring slot, an exit opening and a casting cone, wherein at least one concave bulging is provided in a longitudinal profile of the casting cone that extends along a casting direction, which concave bulging begins at a distance below the pouring slot and extends up to the exit opening;
 wherein a beginning of the at least one concave bulging is in an initial region, the initial region extending from 30% to 70% of a mold cavity length measured from the pouring slot. 
 
   
   
     2. The mold as recited in  claim 1 , wherein the at least one concave bulging begins at half the length of the mold cavity. 
   
   
     3. The mold as recited in  claim 1 , wherein the mold is on figured to be filled to a predetermined casting bath level position and wherein a distance between the predetermined casting bath level position and the at least one concave bulging is greater than 10% of a length of the mold cavity. 
   
   
     4. The mold as recited in  claim 1 , wherein the mold is configured to be filled to a predetermined casting bath level position and wherein a distance between the predetermined casting bath level position and the at least one concave bulging is greater than 20% of the length of the mold cavity. 
   
   
     5. The mold as recited in  claim 1 , wherein the conicity decreases more rapidly in a deepest part of the at least one concave bulging than at an edge of the at least one concave bulging. 
   
   
     6. The mold as recited in  claim 1 , wherein the conicity at a deepest part of the at least one concave bulging decreases down to at most 0% per meter. 
   
   
     7. The mold as recited in  claim 1 , wherein the conicity at edges of the bulgings decreases to a range of 0.6% per meter to 1.5% per meter. 
   
   
     8. The mold as recited in  claim 1 , wherein adjacent bulgings form an undulating transverse profile. 
   
   
     9. The mold as recited in  claim 1 , wherein the concave bulgings are symmetrically positioned and the mold cavity has a rectangular, polygonal or cylindrical cross section. 
   
   
     10. The mold as recited in  claim 9 , wherein the concave bulgings are diametrically positioned and the mold cavity has a cylindrical cross section. 
   
   
     11. The mold as recited in  claim 1 , wherein at least one concave bulging is provided in each mold side of the mold cavity and the mold cavity is rectangular or polygonal in cross section. 
   
   
     12. The mold as recited in  claim 1 , wherein the conicity of the mold cavity, that is a function of location in the casting direction (G), is a curve that is describable by a continuous function. 
   
   
     13. The mold as recited in  claim 1 , wherein the conicity of the mold cavity, that is a function of location in the casting direction (G), is defined by a side-by-side arrangement of at least one of curve sections and straight line sections. 
   
   
     14. The mold as recited in  claim 1 , wherein a contour of the at least one concave bulging transversely to the casting direction is a curve that is describable by a continuous function. 
   
   
     15. The mold as recited in  claim 1 , wherein a contour of the at least one concave bulging transversely to the casting direction is defined by a side-by-side arrangement of at least one of curve sections and straight line sections. 
   
   
     16. The mold as recited in  claim 1 , wherein a contour of the at least one concave bulging is produced at least partially by a depositing method. 
   
   
     17. The mold as recited in  claim 1 , wherein a contour of the at least one concave bulging is produced at least partially by a material removal method.